Analysis
- max time kernel
147s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
24/06/2024, 09:08
General
- Target 744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe
- Size 780KB
- Sample240624-k4ef7svbrf
- SHA256 744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751
Malware Config
Extracted
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djvu
-
http://cjto.top/sgfjsgdfgsgddagdpen4/get.php
-
extension
.maas
-
offline_id
lhxqPpWFK0CiFzpfdXBaKGsuOjwIW2Jm623TOft1
-
payload_url
http://cjto.top/files/penelop/updatewin1.exe
http://cjto.top/files/penelop/updatewin2.exe
http://cjto.top/files/penelop/updatewin.exe
http://cjto.top/files/penelop/3.exe
http://cjto.top/files/penelop/4.exe
http://cjto.top/files/penelop/5.exe
-
ransomnote
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Signatures
- Detected Djvu ransomware 12 IoCs
- Djvu Ransomware
Ransomware which is a variant of the STOP family.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Modifies file permissions 1 TTPs 1 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 1 IoCs
- Suspicious behavior: EnumeratesProcesses 4 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe"C:\Users\Admin\AppData\Local\Temp\744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe"1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\6a7aaa14-f3db-4080-af8a-72bf03964c79" /deny *S-1-1-0:(OI)(CI)(DE,DC)2⤵
- Modifies file permissions
-
-
C:\Users\Admin\AppData\Local\Temp\744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe"C:\Users\Admin\AppData\Local\Temp\744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe" --Admin IsNotAutoStart IsNotTask2⤵
- Suspicious behavior: EnumeratesProcesses
-
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1568 -s 15922⤵
- Program crash
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 1568 -ip 15681⤵
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C:\Users\Admin\AppData\Local\6a7aaa14-f3db-4080-af8a-72bf03964c79\744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exeC:\Users\Admin\AppData\Local\6a7aaa14-f3db-4080-af8a-72bf03964c79\744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe --Task1⤵
- Executes dropped EXE
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe
memory/1568-11-0x00000000029F0000-0x0000000002B0A000-memory.dmp
memory/1568-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1568-5-0x0000000000400000-0x0000000000D09000-memory.dmp
memory/1568-2-0x0000000002950000-0x00000000029E5000-memory.dmp
memory/1568-3-0x00000000029F0000-0x0000000002B0A000-memory.dmp
memory/1568-12-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1568-10-0x0000000000400000-0x0000000000D09000-memory.dmp
memory/1568-0-0x0000000000400000-0x0000000000D09000-memory.dmp
memory/1788-31-0x0000000000400000-0x0000000000D09000-memory.dmp
memory/1788-34-0x0000000000400000-0x0000000000D09000-memory.dmp
memory/4188-14-0x0000000000400000-0x0000000000D09000-memory.dmp
memory/4188-17-0x0000000000400000-0x0000000000D09000-memory.dmp
memory/4188-21-0x0000000000400000-0x0000000000D09000-memory.dmp
memory/4188-22-0x0000000000400000-0x0000000000D09000-memory.dmp
memory/4188-15-0x0000000000400000-0x0000000000D09000-memory.dmp
memory/4188-8-0x0000000000400000-0x0000000000D09000-memory.dmp